1/*	$NetBSD: kgdb_glue.c,v 1.2 2007/10/17 19:56:43 garbled Exp $	*/
2
3/*
4 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
5 * Copyright (C) 1995, 1996 TooLs GmbH.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by TooLs GmbH.
19 * 4. The name of TooLs GmbH may not be used to endorse or promote products
20 *    derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#include <sys/cdefs.h>
35__KERNEL_RCSID(0, "$NetBSD: kgdb_glue.c,v 1.2 2007/10/17 19:56:43 garbled Exp $");
36
37#include <sys/param.h>
38
39#include <kgdb/kgdb.h>
40
41#include <machine/frame.h>
42#include <machine/kgdb.h>
43#include <machine/pcb.h>
44#include <machine/psl.h>
45#include <machine/trap.h>
46
47int kgdbregs[NREG];
48
49#ifdef	KGDBUSERHACK
50int kgdbsr;	/* TEMPRORARY (Really needs some better mechanism)	XXX */
51int savesr;
52#endif
53
54void
55kgdbinit(void)
56{
57}
58
59int
60kgdb_poll(void)
61{
62	/* for now: */
63	return 0;
64}
65
66int
67kgdb_trap_glue(struct trapframe *frame)
68{
69	if (!(frame->srr1 & PSL_PR)
70	    && (frame->exc == EXC_TRC
71		|| (frame->exc == EXC_PGM
72		    && (frame->srr1 & 0x20000))
73		|| frame->exc == EXC_BPT)) {
74#ifdef	KGDBUSERHACK
75		__asm ("mfsr %0,%1" : "=r"(savesr) : "K"(USER_SR)); /* see above		XXX */
76#endif
77		kgdbcopy(frame, kgdbregs, sizeof kgdbregs);
78		kgdbregs[MSR] &= ~PSL_BE;
79
80		switch (kgdbcmds()) {
81		case 2:
82		case 0:
83			kgdbregs[MSR] &= ~PSL_SE;
84			break;
85		case 1:
86			kgdbregs[MSR] |= PSL_SE;
87			break;
88		}
89		kgdbcopy(kgdbregs, frame, sizeof kgdbregs);
90#ifdef	KGDBUSERHACK
91		__asm ("mtsr %0,%1; isync" :: "K"(USER_SR), "r"(savesr));
92#endif
93		return 1;
94	}
95	return 0;
96}
97